auth: Low-level API for minting delegation tokens.

server/auth/delegation/doc.go

Index: server/auth/delegation/doc.go
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+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// Package delegation contains low-level API for working with delegation tokens.
+//
+// It provides convenient wrappers around Auth Service API for creating the
+// tokens and related proto messages.
+//
+// If you don't know what it is, or why you would use it, you probably don't
+// need it.
+//
+// Prefer the high-level API in server/auth package, in particular
+// `MintDelegationToken` and `auth.GetRPCTransport(ctx, auth.AsUser)`.
+package delegation